Unicel C-4440 Replacement Filter Cartridge | 40 Sq. Ft. | 16 3/4" | Sundance Spas
- SKU:
- C-4440
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About This Item
The Unicel C-4440 is a 4000 Series 40 sq. ft. replacement filter cartridge built for Sundance Spas filtration systems. Featuring 158 precision-folded pleats of 4 oz. Reemay 2040 polyester media across a 16 3/4" profile, it delivers thorough debris capture and sustained water clarity between cleanings. The castle-style closed top cap and open bottom seat securely on your spa's standpipe — no guesswork, no adapters.
⚠️ IMPORTANT: Some Sundance Spa Models Use Two Filter Cartridges
Certain Sundance Spas are equipped with a dual-filter system that requires two separate cartridges — this C-4440 (replaces Sundance 6540-495) and a second filter cartridge (Sundance 6540-497). If your spa uses both part numbers, you will need to order both filters for a complete service. The companion filter is the Unicel C-4305. Check your owner's manual or existing cartridges for part numbers before ordering.
Specifications
| Filter Area | 40 sq. ft. |
| Length | 16 3/4" |
| Outer Diameter | 4 5/8" |
| Top Inner Diameter | N/A (closed castle cap) |
| Bottom Inner Diameter | 2 1/16" |
| Material | 4 oz. Reemay 2040 |
| Pleat Count | 158 |
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Top Cap: castle
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Bottom Cap: open
|
Fits into:
| OEM Brand | Product Name | Part Number | Notes |
| Sundance Spas | — | 6540-495 | Primary filter cartridge. Some models also require 6540-497 (see callout above). |
(This is not an exhaustive list.)
Pro Tip: Before ordering, measure your existing cartridge end-cap to end-cap (16 3/4") and confirm the outer diameter (4 5/8") and top cap style (closed castle). Sundance filtration configurations vary by model year — verifying by OEM part number 6540-495 is the most reliable way to confirm fitment.
Also known as: C4440